JP2012014962A - Battery pack - Google Patents

Battery pack Download PDF

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JP2012014962A
JP2012014962A JP2010150568A JP2010150568A JP2012014962A JP 2012014962 A JP2012014962 A JP 2012014962A JP 2010150568 A JP2010150568 A JP 2010150568A JP 2010150568 A JP2010150568 A JP 2010150568A JP 2012014962 A JP2012014962 A JP 2012014962A
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battery
fitting
separator
bind bar
battery cell
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JP2010150568A
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JP5535794B2 (en
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Masao Kume
正夫 久米
Suiko Murakami
穂幸 村上
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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Priority to JP2010150568A priority Critical patent/JP5535794B2/en
Priority to CN2011101522679A priority patent/CN102315401A/en
Priority to EP20110005219 priority patent/EP2403032A1/en
Priority to US13/173,543 priority patent/US8999555B2/en
Publication of JP2012014962A publication Critical patent/JP2012014962A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0481—Compression means other than compression means for stacks of electrodes and separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/08—Structural combinations, e.g. assembly or connection, of hybrid or EDL capacitors with other electric components, at least one hybrid or EDL capacitor being the main component
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H01G11/82—Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/293—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H01G11/12—Stacked hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/627—Stationary installations, e.g. power plant buffering or backup power supplies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6563—Gases with forced flow, e.g. by blowers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Abstract

PROBLEM TO BE SOLVED: To effectively prevent various types of negative effects due to vibration by preventing the vibration of a square battery cell with an extremely simple structure.SOLUTION: A battery pack comprises: battery laminated bodies 5 each formed by stacking a plurality of square battery cells 1 with separators 2 interposed between the cells; end plates 3 arranged on end faces of the battery laminated bodies 5; binding bars 4 extended in a stacking direction of the battery laminated bodies 5 and fixed to the end plates 3 so as to bind both side faces of the stacked battery laminated bodies 5. The binding bars 4 are plates which extend along the surface of the battery laminated bodies 5 and have a predetermined width. The binding bars 4 and the separators 2 are coupled together in a fitting structure to mutually restrict their vertical movement.

Description

本発明は、複数の角形電池セルをセパレータを挟んで積層してなる組電池に関し、特にハイブリッドカーや電気自動車等の電動車両に搭載されて、車両を走行させるモータに電力を供給する電源に最適な組電池に関する。   The present invention relates to an assembled battery in which a plurality of rectangular battery cells are stacked with a separator interposed therebetween, and is particularly suitable for a power source that is mounted on an electric vehicle such as a hybrid car or an electric vehicle and supplies electric power to a motor that runs the vehicle. Related to an assembled battery.

車両用の組電池は、多数の電池セルを直列に接続して出力電圧を高く、出力電力を大きくしている。また、体積に対する充電容量を大きくすることから、多数の角形電池セルを積層状態に配置する組電池が開発されている。（特許文献１参照）   An assembled battery for a vehicle has a large number of battery cells connected in series to increase output voltage and output power. Further, in order to increase the charging capacity with respect to the volume, an assembled battery in which a large number of rectangular battery cells are arranged in a stacked state has been developed. (See Patent Document 1)

この組電池は、角形電池セルを積層状態で締結するために、アングル材のバインドバーで固定している。バインドバーは、積層状態の角形電池セルの両端面に配置されたエンドプレートに両端を固定している。   In this assembled battery, in order to fasten the prismatic battery cells in a stacked state, the assembled battery is fixed with a bind bar made of an angle material. Both ends of the bind bar are fixed to end plates disposed on both end faces of the stacked rectangular battery cell.

特開２０１０−８６８８７号公報JP 2010-86887 A

以上の組電池は、バインドバーで挟着される角形電池セルの上下振動を確実に阻止するのが難しい。とくに、車両等のように振動を受ける環境で使用されて、角形電池セルの振動を確実に阻止できない。多数の角形電池セルをセパレータを挟んで積層している組電池は、振動環境に配置されると、中央部の角形電池セルが上下に振動される。この状態で中央部の角形電池セルが振動されて種々の弊害を起こす。たとえば、振動する角形電池セルの表面に設けている絶縁層が、振動しないバインドバーに擦られて破損して、絶縁破壊や漏電の原因となる。また、振動によって角形電池セルが物理的に損傷されて電気特性を悪化させ、あるいは寿命を短くする等の弊害となる。   In the above assembled battery, it is difficult to reliably prevent the vertical vibration of the rectangular battery cell sandwiched between the bind bars. In particular, it is used in an environment subject to vibration such as a vehicle, and cannot reliably prevent vibration of the rectangular battery cell. When a battery pack in which a large number of prismatic battery cells are stacked with a separator interposed therebetween is arranged in a vibration environment, the prismatic battery cell in the center is vibrated up and down. In this state, the square battery cell in the center is vibrated and causes various problems. For example, an insulating layer provided on the surface of a vibrating rectangular battery cell is rubbed and damaged by a non-vibrating bind bar, which causes dielectric breakdown or electric leakage. In addition, the square battery cell is physically damaged by the vibration, thereby deteriorating electrical characteristics or shortening the service life.

角形電池セルの振動は、バインドバーで強く加圧するように締結して少なくできるが、この構造では、振動を確実に阻止するのが難しいばかりでなく、角形電池セルを強く加圧することで他の弊害が発生する。たとえば、セパレータが変形して安定して冷却できなくなり、あるいは角形電池セルが変形する等の弊害が発生する。   The vibration of the prismatic battery cell can be reduced by tightening with a bind bar so that it is strongly pressed. However, with this structure, not only is it difficult to reliably prevent the vibration, Bad effects occur. For example, the separator may be deformed and cannot be stably cooled, or a negative effect such as deformation of the rectangular battery cell may occur.

本発明は、以上の欠点を解決することを目的に開発されたものである。本発明の重要な目的は、極めて簡単な構造で角形電池セルの振動を阻止し、振動による種々の弊害を有効に防止できる組電池を提供することにある。   The present invention has been developed for the purpose of solving the above drawbacks. An important object of the present invention is to provide an assembled battery that can prevent vibrations of a rectangular battery cell with an extremely simple structure and can effectively prevent various problems caused by vibration.

課題を解決するための手段及び発明の効果Means for Solving the Problems and Effects of the Invention

本発明の組電池は、複数の角形電池セル１をセパレータ２を挟んで積層してなる電池積層体５と、電池積層体５の端面に配置されたエンドプレート３と、電池積層体５の積層方向に延長され、積層された電池積層体５の両側面を締結するようエンドプレート３に固定されたバインドバー４とを備えている。バインドバー４は、電池積層体５の表面に沿う所定の幅を有する板状で、このバインドバー４とセパレータ２とが、互いに上下方向の移動を制限する嵌合構造で連結されている。
ただし、本明細書において、「上下方向」は、バインドバーが表面に位置する電池積層体の側面と、セパレータの主面に接する角形電池セルとの両方に平行な方向を意味する。 The battery pack of the present invention includes a battery laminate 5 formed by laminating a plurality of rectangular battery cells 1 with a separator 2 interposed therebetween, an end plate 3 disposed on an end surface of the battery laminate 5, and a laminate of the battery laminate 5. And a bind bar 4 fixed to the end plate 3 so as to fasten both side surfaces of the stacked battery stack 5. The bind bar 4 is a plate having a predetermined width along the surface of the battery stack 5, and the bind bar 4 and the separator 2 are connected to each other with a fitting structure that restricts movement in the vertical direction.
However, in the present specification, the “vertical direction” means a direction parallel to both the side surface of the battery stack in which the bind bar is located on the surface and the rectangular battery cell in contact with the main surface of the separator.

以上の組電池は、極めて簡単な構造で角形電池セルの振動を阻止し、振動による種々の弊害を有効に防止できる特徴がある。それは、板状であるバインドバーが、電池積層体の表面に沿う面内での曲げ強度、すなわち上下方向の曲げ強度が強く、しかもこれが上下方向に移動しないようにセパレータに嵌合構造で連結しているからである。上下方向に移動しないバインドバーに連結されたセパレータは、バインドバーによって上下方向の振動が阻止される。角形電池セルは両面をセパレータに挟まれているので、角形電池セルを挟着しているセパレータの上下方向の振動を阻止することで、角形電池セルの振動を阻止できる。とくに、セパレータとバインドバーとが相対的に上下に移動しないので、セパレータに挟着してなる角形電池セルとバインドバーとの相対的な振動を確実に阻止でき、角形電池セルとバインドバーとが擦れ合って損傷する弊害を確実に阻止できる。また、角形電池セルの振動を阻止できることから、角形電池セルの振動による弊害も確実に阻止できる。   The assembled battery described above has a feature that can prevent the square battery cells from vibrating with an extremely simple structure and effectively prevent various problems caused by the vibration. The plate-like bind bar has a strong bending strength in the plane along the surface of the battery stack, that is, the bending strength in the vertical direction, and is connected to the separator with a fitting structure so that it does not move in the vertical direction. Because. The separator coupled to the bind bar that does not move in the vertical direction is prevented from vibrating in the vertical direction by the bind bar. Since both sides of the prismatic battery cell are sandwiched between the separators, the vibration of the prismatic battery cell can be prevented by preventing the vertical vibration of the separator sandwiching the prismatic battery cell. In particular, since the separator and the bind bar do not move relative to each other, relative vibration between the square battery cell sandwiched between the separator and the bind bar can be reliably prevented, and the square battery cell and the bind bar are The harmful effects of rubbing and damage can be reliably prevented. Moreover, since the vibration of the prismatic battery cell can be prevented, the harmful effects caused by the vibration of the prismatic battery cell can be reliably prevented.

本発明の組電池は、セパレータ２が、バインドバー４の嵌着溝２４を有して、この嵌着溝２４にバインドバー４を嵌合させることができる。
この組電池は、セパレータの嵌着溝にバインドバーを嵌着することで、セパレータとバインドバーとの相対的な振動を阻止できるので、簡単に組み立てしながら、角形電池セルの振動を有効に阻止できる。 In the assembled battery of the present invention, the separator 2 has the fitting groove 24 of the bind bar 4, and the bind bar 4 can be fitted into the fitting groove 24.
This assembled battery can prevent relative vibration between the separator and the bind bar by fitting the bind bar into the fitting groove of the separator. it can.

本発明の組電池は、セパレータ２が、両側上部又は両側下部に嵌着溝２４を有すると共に、バインドバー４を、横断面形状をＬ字状として、電池積層体５の側面に沿う垂直部４１と、嵌着溝２４に挿入される水平部４２とで構成して、水平部４２を嵌着溝２４に案内することができる。
以上の組電池は、Ｌ字状としてバインドバーに設けている水平部をセパレータの嵌着溝に挿入するので、バインドバーとセパレータとを確実に連結して、相対的に振動しない構造にできる。また、バインドバーの上下方向と水平方向の曲げ強度を強くして、バインドバーでもって、電池積層体を強固に連結できる特徴も実現する。 In the battery pack of the present invention, the separator 2 has fitting grooves 24 at both upper or lower sides, and the binding bar 4 has an L-shaped cross section, and a vertical portion 41 along the side surface of the battery stack 5. And the horizontal portion 42 inserted into the fitting groove 24, and the horizontal portion 42 can be guided to the fitting groove 24.
In the above assembled battery, since the horizontal portion provided in the bind bar as an L shape is inserted into the fitting groove of the separator, the bind bar and the separator can be reliably connected to each other so as not to vibrate relatively. In addition, the bending strength in the vertical and horizontal directions of the bind bar is increased, and the battery stack can be firmly connected with the bind bar.

本発明の組電池は、バインドバー４を電池積層体５の両面の上下に配置することができる。
この組電池は、電池積層体の両面の上下をバインドバーで締結するので、積層される複数の角形電池セルをより強固に連結して、角形電池セルの振動をより有効に防止できる。 In the assembled battery of the present invention, the bind bars 4 can be arranged on both sides of the battery stack 5.
In this assembled battery, since the upper and lower sides of the battery stack are fastened with the bind bars, the plurality of stacked rectangular battery cells can be more firmly connected, and the vibration of the rectangular battery cells can be more effectively prevented.

本発明の組電池は、角形電池セル１が金属外装ケース１１を備えて、金属外装ケース１１の表面を絶縁層１６で被覆することができる。
以上の組電池は、角形電池セルの金属外装ケースを絶縁層で絶縁しながら、この絶縁層がバインドバーに擦られて破損するのを有効に阻止して、絶縁破壊や漏電を確実に阻止できる特徴がある。 In the assembled battery of the present invention, the rectangular battery cell 1 includes the metal outer case 11, and the surface of the metal outer case 11 can be covered with the insulating layer 16.
The above assembled battery can effectively prevent dielectric breakdown and electric leakage by effectively preventing the insulating layer from rubbing and being damaged by the binding bar while insulating the metal outer case of the rectangular battery cell with the insulating layer. There are features.

本発明の組電池は、セパレータ２が、上端と下端とに、角形電池セル１を内側に嵌着する嵌着突出部２３を有して、上下の嵌着突出部２３の間に角形電池セル１を配置することができる。
以上の組電池は、セパレータと角形電池セルとを上下に移動しないように連結するので、両面のセパレータと角形電池セルとの相対的な上下運動を確実に阻止できる。このため、角形電池セルの上下方向の振動を理想的な状態で防止できる特徴がある。 In the assembled battery of the present invention, the separator 2 has fitting protrusions 23 for fitting the rectangular battery cells 1 at the upper and lower ends, and the prismatic battery cells between the upper and lower fitting protrusions 23. 1 can be arranged.
Since the above assembled battery connects the separator and the rectangular battery cell so as not to move up and down, relative vertical movement between the separator on both sides and the rectangular battery cell can be reliably prevented. For this reason, there exists the characteristic which can prevent the vibration of the up-down direction of a square battery cell in an ideal state.

本発明の組電池は、セパレータ２が、上端と下端とに、角形電池セル１を内側に嵌着する嵌着突出部２３を有し、上下の嵌着突出部２３の間に角形電池セル１を配置すると共に、この嵌着突出部２３にバインドバー４を嵌着する嵌着溝２４を設けることができる。
以上の組電池は、角形電池セルの上下方向の振動を極めて有効に阻止できることに加えて、バインドバーの水平部を角形電池セルの上方や下方の邪魔にならない位置に配置できる。このため、バインドバーの水平部の幅を広くして、バインドバーとセパレータとを確実に連結し、かつ水平部でもってバインドバーの曲げ強度を向上して、強固に角形電池セルを積層状態に固定できる。 In the battery pack of the present invention, the separator 2 has fitting protrusions 23 for fitting the rectangular battery cells 1 on the upper and lower ends thereof, and the prismatic battery cells 1 between the upper and lower fitting protrusions 23. And a fitting groove 24 for fitting the bind bar 4 to the fitting protrusion 23.
The above assembled battery can extremely effectively prevent the vertical vibration of the prismatic battery cell, and in addition, the horizontal portion of the bind bar can be disposed at a position that does not interfere with or above the prismatic battery cell. Therefore, the width of the horizontal portion of the bind bar is widened to securely connect the bind bar and the separator, and the bending strength of the bind bar is improved with the horizontal portion, so that the square battery cells are firmly laminated. Can be fixed.

本発明の一実施例にかかる組電池を備える電源装置の外観斜視図である。It is an external appearance perspective view of a power supply device provided with the assembled battery concerning one Example of this invention. 図１に示す電源装置の垂直横断面図である。It is a vertical cross-sectional view of the power supply device shown in FIG. 図１に示す電源装置の外ケースを外した状態を示す斜視図である。It is a perspective view which shows the state which removed the outer case of the power supply device shown in FIG. 本発明の一実施例にかかる組電池の斜視図である。It is a perspective view of the assembled battery concerning one Example of this invention. 図４に示す組電池の分解斜視図である。It is a disassembled perspective view of the assembled battery shown in FIG. 図４に示す組電池を構成する角形電池セルとセパレータを積層する状態を示す分解斜視図である。It is a disassembled perspective view which shows the state which laminates | stacks the square battery cell and separator which comprise the assembled battery shown in FIG. 図４に示す組電池の要部拡大断面図である。It is a principal part expanded sectional view of the assembled battery shown in FIG. 本発明の他の実施例にかかる組電池の斜視図である。It is a perspective view of the assembled battery concerning the other Example of this invention. 図８に示す組電池の分解斜視図である。It is a disassembled perspective view of the assembled battery shown in FIG. 本発明の他の実施例にかかる組電池の斜視図である。It is a perspective view of the assembled battery concerning the other Example of this invention. 図１０に示す組電池の分解斜視図である。It is a disassembled perspective view of the assembled battery shown in FIG.

以下、本発明の実施の形態を図面に基づいて説明する。ただし、以下に示す実施の形態は、本発明の技術思想を具体化するための組電池を例示するものであって、本発明は組電池を以下のものに特定しない。また特許請求の範囲に示される部材を、実施の形態の部材に特定するものでは決してない。なお、各図面が示す部材の大きさや位置関係等は、説明を明確にするため誇張していることがある。さらに以下の説明において、同一の名称、符号については同一もしくは同質の部材を示しており、詳細説明を適宜省略する。さらに、本発明を構成する各要素は、複数の要素を同一の部材で構成して一の部材で複数の要素を兼用する態様としてもよいし、逆に一の部材の機能を複数の部材で分担して実現することもできる。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies an assembled battery for embodying the technical idea of the present invention, and the present invention does not specify the assembled battery as follows. Moreover, the member shown by the claim is not what specifies the member of embodiment. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing.

以下、本発明の実施例として組電池を車両を走行させるモータに電力を挟着する車載用の電源装置に適用した例を、図１ないし図７に基づいて説明する。   Hereinafter, an example in which an assembled battery is applied to an in-vehicle power supply apparatus that sandwiches electric power with a motor that drives a vehicle will be described with reference to FIGS. 1 to 7 as an embodiment of the present invention.

組電池は、外ケース６に収納されて電源装置として車両に搭載される。外ケース６と組電池との間には、組電池の角形電池セル１を冷却する冷却ダクト７を設けている。この冷却ダクト７に強制送風される冷却気体は、セパレータ２と角形電池セル１との間に送風されて、角形電池セル１を冷却する。   The assembled battery is housed in the outer case 6 and mounted on the vehicle as a power supply device. Between the outer case 6 and the assembled battery, a cooling duct 7 for cooling the prismatic battery cell 1 of the assembled battery is provided. The cooling gas forcedly blown into the cooling duct 7 is blown between the separator 2 and the prismatic battery cell 1 to cool the prismatic battery cell 1.

組電池は、図４ないし図６に示すように、複数の角形電池セル１をセパレータ２を挟んで積層した電池積層体５で構成される。セパレータ２は角形電池セル１同士の間に送風隙間２６を形成するスペーサとして機能する。送風隙間２６には、強制送風機構（図示せず）によって冷却気体が強制送風され、これにより角形電池セル１が冷却される。さらに複数の角形電池セル１の内、いくつかには温度センサ（図示せず）が熱結合されており、角形電池セル１の温度を温度センサで検出することにより、組電池全体の温度を推測する。温度センサで検出した電気信号は温度制御回路（図示せず）に送出され、温度制御回路側で電気信号に対応する温度情報として受領し、必要な温度制御、例えば強制送風機構の送風ファン駆動モータの回転数を変化させたり、あるいは充放電回路の充放電電流を制限する。   As shown in FIGS. 4 to 6, the assembled battery includes a battery stack 5 in which a plurality of rectangular battery cells 1 are stacked with a separator 2 interposed therebetween. The separator 2 functions as a spacer that forms a ventilation gap 26 between the rectangular battery cells 1. Cooling gas is forcibly blown into the blowing gap 26 by a forced blowing mechanism (not shown), thereby cooling the rectangular battery cell 1. Further, a temperature sensor (not shown) is thermally coupled to some of the plurality of prismatic battery cells 1, and the temperature of the prismatic battery cell 1 is detected by the temperature sensor to estimate the temperature of the entire assembled battery. To do. The electric signal detected by the temperature sensor is sent to a temperature control circuit (not shown) and received as temperature information corresponding to the electric signal on the temperature control circuit side, and necessary temperature control, for example, a fan driving motor for a forced air blowing mechanism Or the charge / discharge current of the charge / discharge circuit is limited.

［組電池］
組電池は、図４ないし図６に示すように、複数枚の角形電池セル１を、絶縁性のセパレータ２を介して積層し、端面に一対のエンドプレート３を配置している。一対のエンドプレート３は、バインドバー４で連結されて、角形電池セル１を積層した電池積層体５を固定している。 [Battery]
As shown in FIGS. 4 to 6, the assembled battery is formed by stacking a plurality of rectangular battery cells 1 via an insulating separator 2 and arranging a pair of end plates 3 on an end surface. The pair of end plates 3 are connected by a bind bar 4 to fix the battery stack 5 in which the rectangular battery cells 1 are stacked.

［角形電池セル１］
角形電池セル１は、その厚さを上辺の横幅よりも薄くした薄型の外装缶１２を利用している。この外装缶１２は、両側を湾曲面として、外装缶１２の四隅のコーナ部を面取りした略箱形形状としている。この形状の外装缶１２は、円筒電池に対する角形電池とも呼ばれる。また外装缶１２の上面で外装缶１２を封止する封口板１３には、正負一対の電極端子１４を突出させると共に、電極端子１４の間に安全弁１５を設けている。安全弁１５は、外装缶１２の内圧が所定値以上に上昇した際に開弁して、内部のガスを放出できるように構成される。安全弁１５の開弁により、外装缶１２の内圧上昇を停止することができる。 [Square battery cell 1]
The rectangular battery cell 1 uses a thin outer can 12 whose thickness is thinner than the width of the upper side. The outer can 12 has a substantially box shape in which both corners are chamfered and corner portions at four corners of the outer can 12 are chamfered. The outer can 12 having this shape is also called a prismatic battery for a cylindrical battery. A sealing plate 13 that seals the outer can 12 on the upper surface of the outer can 12 projects a pair of positive and negative electrode terminals 14 and a safety valve 15 between the electrode terminals 14. The safety valve 15 is configured to open when the internal pressure of the outer can 12 rises to a predetermined value or more, and to release the internal gas. By opening the safety valve 15, the increase in the internal pressure of the outer can 12 can be stopped.

角形電池セル１を構成する素電池は、リチウムイオン電池、ニッケル−水素電池、ニッケル−カドミウム電池等の充電可能な二次電池である。とくに、角形電池セル１にリチウムイオン電池を使用すると、パック電池全体の体積や質量に対する充電容量を大きくできる特長がある。   The unit cell constituting the rectangular battery cell 1 is a rechargeable secondary battery such as a lithium ion battery, a nickel-hydrogen battery, or a nickel-cadmium battery. In particular, when a lithium ion battery is used for the prismatic battery cell 1, the charge capacity with respect to the volume and mass of the whole battery pack can be increased.

図６の角形電池セル１は、所定の厚さを有する四角形で、上面の両端部には正負の電極端子１４を突出して設けており、上面の中央部には安全弁１５の開口部を設けている。積層される角形電池セル１は、隣接する正負の電極端子１４をバスバー１７で連結して互いに直列に接続している。隣接する角形電池セル１を互いに直列に接続するバッテリシステムは、出力電圧を高くして出力を大きくできる。ただ、バッテリシステムは、隣接する角形電池セルを並列に接続することもできる。   The rectangular battery cell 1 of FIG. 6 is a quadrangular shape having a predetermined thickness, and positive and negative electrode terminals 14 are provided so as to protrude from both ends of the upper surface, and an opening of a safety valve 15 is provided at the center of the upper surface. Yes. The stacked rectangular battery cells 1 are connected in series by connecting adjacent positive and negative electrode terminals 14 with a bus bar 17. A battery system in which adjacent rectangular battery cells 1 are connected in series with each other can increase the output voltage and increase the output. However, the battery system can also connect adjacent rectangular battery cells in parallel.

図７の角形電池セル１は、外装缶１２と封口板１３からなる金属外装ケース１１で外装しており、この金属外装ケース１１を絶縁層１６で被覆している。絶縁層１６は熱収縮チューブである。熱収縮チューブの絶縁層１６は、角形電池セル１を入れて加熱して、角形電池セル１の表面に密着して、表面を絶縁する。ただし、絶縁層１６には熱収縮チューブに代わって、絶縁性のフィルムや塗膜も使用できる。角形電池セル１は、金属外装ケース１１の表面を絶縁層１６で絶縁して、金属板のバインドバー４による外装缶１２のショートを防止する。金属外装ケース１１がプラスとマイナスの出力端子には接続されない角形電池セル１は、外装缶１２に電位がある。したがって、この角形電池セル１が金属板のバインドバー４に接触するとショート電流が流れる。絶縁層１６は、角形電池セル１がバインドバー４に接触してショート電流が流れるのを防止する。   The rectangular battery cell 1 of FIG. 7 is covered with a metal outer case 11 including an outer can 12 and a sealing plate 13, and the metal outer case 11 is covered with an insulating layer 16. The insulating layer 16 is a heat shrinkable tube. The insulating layer 16 of the heat-shrinkable tube puts and heats the rectangular battery cell 1 and is in close contact with the surface of the rectangular battery cell 1 to insulate the surface. However, an insulating film or coating film can be used for the insulating layer 16 instead of the heat shrinkable tube. The prismatic battery cell 1 insulates the surface of the metal outer case 11 with an insulating layer 16 to prevent the outer can 12 from being short-circuited by the bind bar 4 made of a metal plate. In the rectangular battery cell 1 in which the metal outer case 11 is not connected to the positive and negative output terminals, the outer can 12 has a potential. Therefore, when this square battery cell 1 comes into contact with the bind bar 4 made of a metal plate, a short current flows. The insulating layer 16 prevents the rectangular battery cell 1 from contacting the bind bar 4 and causing a short current to flow.

さらに、隣接する角形電池セル１は、金属外装ケース１１のショートを防止するために絶縁材のセパレータ２を挟着している。なお、角形電池セルの外装缶は、プラスチックなどの絶縁材で製作することもできる。この場合、角形電池セルは外装缶を絶縁して積層する必要がないので、セパレータを金属製とすることもできる。   Further, the adjacent rectangular battery cells 1 sandwich an insulating separator 2 in order to prevent the metal outer case 11 from being short-circuited. Note that the outer can of the rectangular battery cell can also be made of an insulating material such as plastic. In this case, the prismatic battery cell does not need to be laminated by insulating the outer can, so that the separator can be made of metal.

［セパレータ２］
セパレータ２は、隣接する角形電池セル１を電気的、熱的に絶縁して積層するスペーサである。このセパレータ２はプラスチック等の絶縁材で製作して、隣接する角形電池セル１を絶縁している。セパレータ２は、図６に示すように、角形電池セル１を冷却するために、角形電池セル１との間に、空気などの冷却気体を通過させる送風隙間２６を設けている。図６のセパレータ２は、角形電池セル１との対向面に、両側縁まで延びる溝２１を設けて、角形電池セル１との間に送風隙間２６を設けている。図のセパレータ２は、複数の溝２１を、互いに平行に所定の間隔で設けている。また、このセパレータ２は、両面に溝２１を設けており、互いに隣接する角形電池セル１とセパレータ２との間に送風隙間２６を設けている。この構造は、セパレータ２の両側に形成される送風隙間２６で、両側の角形電池セル１を効果的に冷却できる特長がある。ただ、セパレータ２は、片面にのみ溝を設けて、角形電池セルとセパレータとの間に送風隙間を設けることもできる。図の送風隙間２６は、電池積層体５の左右に開口するように水平方向に設けている。さらに、図６のセパレータ２は、両側に切欠部２２を設けている。このセパレータ２は、両側に設けた切欠部２２において、隣接する角形電池セル１の対向面の間隔を広くして、冷却気体の通過抵抗を少なくできる。このため、冷却気体を切欠部２２からセパレータ２と角形電池セル１との間の送風隙間２６にスムーズに送風して、角形電池セル１を効果的に冷却できる。以上のように、送風隙間２６に強制送風される空気は、角形電池セル１の外装缶１２を直接に効率よく冷却する。この構造は、角形電池セル１の熱暴走を有効に阻止しながら、角形電池セル１を効率よく冷却できる特徴がある。 [Separator 2]
The separator 2 is a spacer for laminating adjacent rectangular battery cells 1 electrically and thermally. The separator 2 is made of an insulating material such as plastic and insulates adjacent rectangular battery cells 1. As shown in FIG. 6, the separator 2 is provided with a blower gap 26 that allows a cooling gas such as air to pass therethrough in order to cool the prismatic battery cell 1. The separator 2 in FIG. 6 is provided with grooves 21 extending to both side edges on the surface facing the prismatic battery cell 1, and a ventilation gap 26 is provided between the separator 2 and the prismatic battery cell 1. In the illustrated separator 2, a plurality of grooves 21 are provided in parallel with each other at a predetermined interval. Further, the separator 2 is provided with grooves 21 on both surfaces, and a ventilation gap 26 is provided between the rectangular battery cell 1 and the separator 2 adjacent to each other. This structure has an advantage that the square battery cells 1 on both sides can be effectively cooled by the air gaps 26 formed on both sides of the separator 2. However, the separator 2 can also be provided with a groove only on one side to provide a ventilation gap between the rectangular battery cell and the separator. The ventilation gap 26 in the figure is provided in the horizontal direction so as to open to the left and right of the battery stack 5. Furthermore, the separator 2 in FIG. 6 has notches 22 on both sides. This separator 2 can reduce the passage resistance of the cooling gas by widening the interval between the opposing surfaces of the adjacent rectangular battery cells 1 in the notch portions 22 provided on both sides. For this reason, the cooling gas can be smoothly blown from the notch portion 22 to the blowing gap 26 between the separator 2 and the prismatic battery cell 1 to effectively cool the prismatic battery cell 1. As described above, the air forcedly blown into the blowing gap 26 directly and efficiently cools the outer can 12 of the rectangular battery cell 1. This structure is characterized in that the prismatic battery cell 1 can be efficiently cooled while effectively preventing thermal runaway of the prismatic battery cell 1.

セパレータ２は、両面に角形電池セル１を嵌着構造で連結するために、図５と図６に示すように、上端と下端とに、角形電池セル１を内側に嵌着する嵌着突出部２３を両面に突出するように設けて、上下の嵌着突出部２３の間に角形電池セル１を配置している。上下の嵌着突出部２３は、角形電池セル１の上面と下面に沿う位置に配置されて、角形電池セル１を上下で挟んで定位置に嵌着する。   As shown in FIGS. 5 and 6, the separator 2 has a fitting protrusion for fitting the rectangular battery cell 1 inward at the upper end and the lower end in order to connect the rectangular battery cell 1 with a fitting structure on both sides. 23 is provided so as to protrude on both sides, and the rectangular battery cell 1 is disposed between the upper and lower fitting protrusions 23. The upper and lower fitting protrusions 23 are arranged at positions along the upper and lower surfaces of the prismatic battery cell 1 and are fitted at fixed positions with the prismatic battery cell 1 sandwiched between the upper and lower sides.

角形電池セル１の下面に配置される嵌着突出部２３は、セパレータ２の長手方向に伸びて、セパレータ２の下縁の全体に設けている。角形電池セル１の上面に配置される嵌着突出部２３は、両端部にのみ設けて、セパレータ２を積層する状態で、角形電池セル１の電極端子１４を外部に露出できるようにしている。   The fitting protrusion 23 disposed on the lower surface of the rectangular battery cell 1 extends in the longitudinal direction of the separator 2 and is provided on the entire lower edge of the separator 2. The fitting protrusions 23 arranged on the upper surface of the prismatic battery cell 1 are provided only at both ends so that the electrode terminals 14 of the prismatic battery cell 1 can be exposed to the outside in a state where the separators 2 are stacked.

角形電池セル１の上面に配置している嵌着突出部２３は、図５ないし図７に示すように、バインドバー４を嵌着する嵌着溝２４を設けている。上側の嵌着突出部２３に設けた嵌着溝２４は、角形電池セル１の積層方向に伸びるバインドバー４の水平部４２を挿入できる形状としている。図のセパレータ２は、上側の嵌着突出部２３にのみバインドバー４の嵌着溝２４を設けているが、下側の嵌着突出部に嵌着溝を設けることもできる。また、上下の嵌着突出部に嵌着溝を設けることもできる。   The fitting protrusion 23 arranged on the upper surface of the rectangular battery cell 1 is provided with a fitting groove 24 for fitting the bind bar 4 as shown in FIGS. The fitting groove 24 provided in the upper fitting protrusion 23 has a shape in which the horizontal portion 42 of the bind bar 4 extending in the stacking direction of the rectangular battery cells 1 can be inserted. In the illustrated separator 2, the fitting groove 24 of the bind bar 4 is provided only on the upper fitting protrusion 23, but the fitting groove can also be provided on the lower fitting protrusion. Also, fitting grooves can be provided in the upper and lower fitting projections.

図４ないし図７のセパレータ２は、嵌着突出部２３にバインドバー４の嵌着溝２４を設けているが、セパレータ２は、図８と図９に示すように、板状のバインドバー４の上下に位置するように一対の凸部２５を設けて、一対の凸部２５の間を嵌着溝２４として、ここに板状のバインドバー４を配置することもできる。セパレータ２に嵌着溝２４を設けて、ここにバインドバー４を嵌着する構造は、バインドバー４とセパレータ２を、互いに上下方向の移動を制限する嵌合構造で連結して、セパレータ２のバインドバー４に対する上下方向の振動を阻止し、セパレータ２によって角形電池セル１の上下方向の振動も阻止する。   The separator 2 in FIGS. 4 to 7 is provided with the fitting groove 24 of the bind bar 4 in the fitting protrusion 23, but the separator 2 has a plate-like bind bar 4 as shown in FIGS. A pair of convex portions 25 may be provided so as to be positioned above and below the plate-like bind bar 4 between the pair of convex portions 25 as fitting grooves 24. The separator 2 is provided with a fitting groove 24 and the bind bar 4 is fitted therein by connecting the bind bar 4 and the separator 2 with a fitting structure that restricts movement in the vertical direction. The vertical vibration with respect to the bind bar 4 is prevented, and the vertical vibration of the rectangular battery cell 1 is also prevented with the separator 2.

セパレータ２の両側に嵌着溝２４を設けて、ここにバインドバー４を嵌着する連結構造は、簡単な構造でバインドバー４とセパレータ２との上下方向の移動を阻止できるが、本発明の組電池は、バインドバー４とセパレータ２の嵌合構造を以上の構造には特定しない。バインドバー４とセパレータ２とが、互いに上下方向の移動を制限する全ての嵌合構造に連結することができる。たとえば、図示しないが、バインドバーに貫通孔を設け、この貫通孔に挿入される凸部をセパレータに設け、この凸部をバインドバーの貫通孔に挿入して、バインドバーとセパレータとを上下方向の移動を制限する嵌合構造で連結し、あるいは、バインドバーにセパレータに向かって突出する嵌着凸部を設け、この嵌着凸部を挿入する嵌着凹部をセパレータの側面に設けて、嵌着凸部を嵌着凹部に挿入して、バインドバーとセパレータとを上下方向の移動を制限する嵌合構造で連結することもできる。   The connection structure in which the fitting grooves 24 are provided on both sides of the separator 2 and the bind bar 4 is fitted therein can prevent the vertical movement between the bind bar 4 and the separator 2 with a simple structure. The assembled battery does not specify the fitting structure of the bind bar 4 and the separator 2 as the above structure. The bind bar 4 and the separator 2 can be connected to all fitting structures that restrict the movement in the vertical direction. For example, although not shown, a through hole is provided in the bind bar, a convex portion to be inserted into the through hole is provided in the separator, and this convex portion is inserted into the through hole of the bind bar so that the bind bar and the separator are vertically moved. Are connected with a fitting structure that restricts the movement of the binding, or a binding convex portion that protrudes toward the separator is provided on the bind bar, and a fitting concave portion for inserting the fitting convex portion is provided on the side surface of the separator, It is also possible to insert the fitting convex portion into the fitting concave portion and connect the bind bar and the separator with a fitting structure that restricts the vertical movement.

［エンドプレート３］
また、角形電池セル１とセパレータ２とを交互に積層した電池積層体５の両端面には一対のエンドプレート３を配置して、一対のエンドプレート３で電池積層体５を締結している。図５のエンドプレート３は、プラスチックを成形して製作している本体部３１の外側に、アルミニウムなどの金属で製作している金属プレート３２を積層する構造としている。ただし、エンドプレートは、全体を金属で製作することもでき、また、全体をプラスチックで成形することもできる。エンドプレート３は、外側表面の四隅部に、バインドバー４を固定する止ネジ３５をねじ込む４個の雌ネジ孔３３を設けている。さらに、図に示すエンドプレート３は、バインドバー４を定位置に配置して固定するために、本体部３１の上面の両側に 、バインドバー４の水平部４２を嵌着する嵌着溝３４を設けている。ただ、エンドプレート３は、図９に示すように、本体部３１の上部の両側に、板状のバインドバー４の上下に位置するように凸部３６を設けて、一対の凸部２５の間を嵌着溝３４としてバインドバー４を案内することもできる。 [End plate 3]
In addition, a pair of end plates 3 are disposed on both end surfaces of the battery stack 5 in which the rectangular battery cells 1 and the separators 2 are alternately stacked, and the battery stack 5 is fastened by the pair of end plates 3. The end plate 3 in FIG. 5 has a structure in which a metal plate 32 made of a metal such as aluminum is laminated on the outside of a main body 31 made by molding plastic. However, the end plate can be entirely made of metal, or can be entirely made of plastic. The end plate 3 is provided with four female screw holes 33 into which the set screws 35 for fixing the bind bar 4 are screwed in the four corners of the outer surface. Further, the end plate 3 shown in the figure has fitting grooves 34 for fitting the horizontal portions 42 of the bind bar 4 on both sides of the upper surface of the main body portion 31 in order to place and fix the bind bar 4 in a fixed position. Provided. However, as shown in FIG. 9, the end plate 3 is provided with convex portions 36 on both sides of the upper portion of the main body portion 31 so as to be positioned above and below the plate-like bind bar 4, and between the pair of convex portions 25. It is also possible to guide the bind bar 4 using the fitting groove 34.

このように、角形電池セル１とセパレータ２との積層体を両端面からエンドプレート３で狭持するよう、バインドバー４で側面を締結する。バインドバー４は、止ネジ３５をエンドプレート３の雌ネジ孔３３にねじ込んで、エンドプレート３に固定される。   In this way, the side surfaces are fastened by the bind bars 4 so that the laminated body of the rectangular battery cell 1 and the separator 2 is sandwiched by the end plates 3 from both end surfaces. The bind bar 4 is fixed to the end plate 3 by screwing a set screw 35 into the female screw hole 33 of the end plate 3.

［バインドバー４］
バインドバー４は、図４、図５、図８、及び図９に示すように電池積層体５の両側面で電池積層体５を締結する。このバインドバー４は、電池積層体５の積層方向に延長され、かつ電池積層体５の表面に沿う所定の幅を有する金属板である。図の組電池は、電池積層体５の側面上下に位置する２本のバインドバー４により締結しており、左右の側面で計４本のバインドバー４により電池積層体５を結束している。また、バインドバー４の端縁は、エンドプレート３の外側面に沿うようにほぼ直角に折曲して折曲片４３としている。折曲片４３には貫通孔４４を設けている。貫通孔４４に挿通される止ネジ３５が、エンドプレート３にねじ込まれて、バインドバー４はエンドプレート３に固定される。 [Bind bar 4]
As shown in FIGS. 4, 5, 8, and 9, the bind bar 4 fastens the battery stack 5 on both side surfaces of the battery stack 5. The bind bar 4 is a metal plate that extends in the stacking direction of the battery stack 5 and has a predetermined width along the surface of the battery stack 5. The assembled battery shown in the figure is fastened by two bind bars 4 positioned above and below the side surface of the battery stack 5, and the battery stack 5 is bound by a total of four bind bars 4 on the left and right sides. Further, the edge of the bind bar 4 is bent at a substantially right angle along the outer surface of the end plate 3 to form a bent piece 43. A through hole 44 is provided in the bent piece 43. A set screw 35 inserted through the through hole 44 is screwed into the end plate 3, and the bind bar 4 is fixed to the end plate 3.

さらに、図４、図５、及び図７に示すバインドバー４は、金属板の横断面形状をＬ字状に加工して、電池積層体５の側面に沿う垂直部４１と、セパレータの嵌着溝２４に挿入される水平部４２とを設けている。バインドバー４の水平部４２は、セパレータ２に設けた嵌着溝２４に案内され位置に設けている。図の組電池は、上側のバインドバー４に水平部４２を設けて、水平部４２をセパレータ２の嵌着溝２４に挿通している。バインドバー４の水平部４２は、角形電池セル１の上面に配置している嵌着突出部２３の嵌着溝２４に挿通される。この水平部４２は、角形電池セル１の上面に、セパレータ２で絶縁して配置される。このバインドバー４は、水平部４２を角形電池セル１の内側に向かって突出させるので、横幅を広くして強靱な構造としながら、電池積層体５の外形を大きくすることがない。   Further, the bind bar 4 shown in FIGS. 4, 5, and 7 is formed by processing the cross-sectional shape of the metal plate into an L shape, and attaching the vertical portion 41 along the side surface of the battery stack 5 and the separator. A horizontal portion 42 to be inserted into the groove 24 is provided. The horizontal portion 42 of the bind bar 4 is provided at a position guided by the fitting groove 24 provided in the separator 2. In the illustrated battery pack, a horizontal portion 42 is provided on the upper bind bar 4, and the horizontal portion 42 is inserted into the fitting groove 24 of the separator 2. The horizontal portion 42 of the bind bar 4 is inserted into the fitting groove 24 of the fitting protrusion 23 disposed on the upper surface of the rectangular battery cell 1. The horizontal portion 42 is disposed on the upper surface of the rectangular battery cell 1 while being insulated by the separator 2. Since the bind bar 4 projects the horizontal portion 42 toward the inside of the rectangular battery cell 1, the outer shape of the battery stack 5 is not increased while the lateral width is widened and the structure is strong.

図４と図５の組電池は、上側のバインドバー４のみを横断面形状をＬ字状とするが、この構造は、組電池の上下幅を広くすることなく、バインドバー４とセパレータ２の上下方向の移動を制限できる。バインドバー４を嵌着している嵌着突出部２３を、角形電池セル１の上面の両側部であって、電極端子１４よりも下方に配置できるからである。   4 and 5, only the upper bind bar 4 has an L-shaped cross section, but this structure does not increase the vertical width of the assembled battery, so that the bind bar 4 and the separator 2 The movement in the vertical direction can be restricted. This is because the fitting protrusions 23 to which the bind bars 4 are fitted can be arranged on both sides of the upper surface of the rectangular battery cell 1 and below the electrode terminals 14.

ただ、組電池は、上下のバインドバーの横断面形状をＬ字状として、セパレータの上下に嵌着溝のある嵌着突出部を設けて、上下のバインドバーの水平部をセパレータの上下に設けた嵌着突出部の嵌着溝に挿入する構造とすることもでき、また、下側のバインドバーのみの横断面形状をＬ字状として、セパレータの下側に設けた嵌着突出部の嵌着溝にバインドバーの水平部を挿入する構造とすることもできる。   However, the assembled battery has an L-shaped cross section of the upper and lower bind bars, and has fitting protrusions with fitting grooves above and below the separator, and the horizontal parts of the upper and lower bind bars are provided above and below the separator. It is also possible to adopt a structure that is inserted into the fitting groove of the fitting projection, and the fitting of the fitting projection provided on the lower side of the separator is made L-shaped in the cross-sectional shape of only the lower binding bar. It is also possible to adopt a structure in which the horizontal portion of the bind bar is inserted into the landing groove.

さらに、図８と図９の組電池は、バインドバー４を平面状の金属板としている。このバインドバー４は、セパレータ２の両側面に設けている、一対の凸部２５の間に設けてなる嵌着溝２４に案内されて、嵌合構造でセパレータ２に連結している。   Further, in the assembled battery of FIGS. 8 and 9, the bind bar 4 is a flat metal plate. The bind bar 4 is guided by a fitting groove 24 provided between the pair of convex portions 25 provided on both side surfaces of the separator 2, and is coupled to the separator 2 with a fitting structure.

さらに、図１０と図１１の組電池は、上下のバインドバー４の中間を補強板４５で連結している。図の組電池は、上下のバインドバー４を複数の補強板４５で連結している。補強板４５は、電池積層体５の側面に沿う金属板で、上下を溶接などの方法でバインドバー４に固定している。この組電池は、バインドバー４をより強靱な構造として、電池積層体５をより振動しない状態で締結できる。   Further, in the assembled battery of FIGS. 10 and 11, the middle of the upper and lower bind bars 4 is connected by a reinforcing plate 45. In the illustrated assembled battery, the upper and lower bind bars 4 are connected by a plurality of reinforcing plates 45. The reinforcing plate 45 is a metal plate along the side surface of the battery stack 5, and the upper and lower sides are fixed to the bind bar 4 by a method such as welding. This assembled battery can be fastened with the bind bar 4 having a tougher structure and the battery stack 5 not being vibrated.

１…角形電池セル
２…セパレータ
３…エンドプレート
４…バインドバー
５…電池積層体
６…外ケース
７…冷却ダクト
１１…金属外装ケース
１２…外装缶
１３…封口板
１４…電極端子
１５…安全弁
１６…絶縁層
１７…バスバー
２１…溝
２２…切欠部
２３…嵌着突出部
２４…嵌着溝
２５…凸部
２６…送風隙間
３１…本体部
３２…金属プレート
３３…雌ネジ孔
３４…嵌着溝
３５…止ネジ
３６…凸部
４１…垂直部
４２…水平部
４３…折曲片
４４…貫通孔
４５…補強板 DESCRIPTION OF SYMBOLS 1 ... Square battery cell 2 ... Separator 3 ... End plate 4 ... Bind bar 5 ... Battery laminated body 6 ... Outer case 7 ... Cooling duct 11 ... Metal exterior case 12 ... Exterior can 13 ... Sealing plate 14 ... Electrode terminal 15 ... Safety valve 16 DESCRIPTION OF SYMBOLS ... Insulating layer 17 ... Bus bar 21 ... Groove 22 ... Notch part 23 ... Insertion protrusion 24 ... Insertion groove 25 ... Convex part 26 ... Air blow gap 31 ... Main-body part 32 ... Metal plate 33 ... Female screw hole 34 ... Insertion groove 35 ... set screw 36 ... convex part 41 ... vertical part 42 ... horizontal part 43 ... bent piece 44 ... through hole 45 ... reinforcing plate

Claims (7)

複数の角形電池セル(1)をセパレータ(2)を挟んで積層してなる電池積層体(5)と、
前記電池積層体(5)の端面に配置されたエンドプレート(3)と、
前記電池積層体(5)の積層方向に延長され、積層された電池積層体(5)の両側面を締結するよう前記エンドプレート(3)に固定されたバインドバー(4)と、
を備える組電池であって、
前記バインドバー(4)が、電池積層体(5)の表面に沿う所定の幅を有する板状で、
このバインドバー(4)と前記セパレータ(2)とが、互いに上下方向の移動を制限する嵌合構造に連結されてなることを特徴とする組電池。 A battery laminate (5) formed by laminating a plurality of rectangular battery cells (1) with a separator (2) interposed therebetween,
An end plate (3) disposed on an end face of the battery stack (5), and
A binding bar (4) extended in the stacking direction of the battery stack (5) and fixed to the end plate (3) to fasten both side surfaces of the stacked battery stack (5);
An assembled battery comprising:
The bind bar (4) is a plate having a predetermined width along the surface of the battery stack (5),
The assembled battery, wherein the bind bar (4) and the separator (2) are connected to each other in a fitting structure that restricts movement in the vertical direction. 前記セパレータ(2)が、バインドバー(4)の嵌着溝(24)を有し、この嵌着溝(24)にバインドバー(4)が嵌合してなる請求項１に記載される組電池。   The assembly according to claim 1, wherein the separator (2) has a fitting groove (24) for the bind bar (4), and the bind bar (4) is fitted into the fitting groove (24). battery. 前記セパレータ(2)が、両側上部又は両側下部に嵌着溝(24)を有し、前記バインドバー(4)が横断面形状をＬ字状として、電池積層体(5)の側面に沿う垂直部(41)と、前記嵌着溝(24)に挿入される水平部(42)とからなり、水平部(42)を嵌着溝(24)に案内してなる請求項２に記載される組電池。   The separator (2) has fitting grooves (24) at the upper part on both sides or the lower parts on both sides, and the bind bar (4) has a L-shaped cross section, and is perpendicular to the side surface of the battery stack (5). It consists of a part (41) and the horizontal part (42) inserted in the said fitting groove (24), It guides the horizontal part (42) to the fitting groove (24), It is described in Claim 2 Assembled battery. 前記バインドバー(4)が電池積層体(5)の両面の上下に配置されてなる請求項１ないし３のいずれかに記載される組電池。   The assembled battery according to any one of claims 1 to 3, wherein the bind bar (4) is disposed on both sides of the battery stack (5). 前記角形電池セル(1)が金属外装ケース(11)を備え、前記金属外装ケース(11)の表面を絶縁層(16)で被覆してなる請求項１ないし４のいずれかに記載される組電池。   The set according to any one of claims 1 to 4, wherein the rectangular battery cell (1) includes a metal outer case (11), and the surface of the metal outer case (11) is covered with an insulating layer (16). battery. 前記セパレータ(2)が上端と下端とに、角形電池セル(1)を内側に嵌着する嵌着突出部(23)を有し、上下の嵌着突出部(23)の間に角形電池セル(1)を配置してなる請求項１ないし５のいずれかに記載される組電池。   The separator (2) has a fitting protrusion (23) for fitting the rectangular battery cell (1) on the upper and lower ends, and the prismatic battery cell between the upper and lower fitting protrusions (23). The assembled battery according to any one of claims 1 to 5, wherein (1) is disposed. 前記セパレータ(2)が上端と下端とに、角形電池セル(1)を内側に嵌着する嵌着突出部(23)を有し、上下の嵌着突出部(23)の間に角形電池セル(1)が配置されると共に、
前記嵌着突出部(23)にバインドバー(4)を嵌着する嵌着溝(24)を設けてなる請求項３に記載される組電池。 The separator (2) has a fitting protrusion (23) for fitting the rectangular battery cell (1) on the upper and lower ends, and the prismatic battery cell between the upper and lower fitting protrusions (23). (1) is arranged,
The assembled battery according to claim 3, wherein a fitting groove (24) for fitting the bind bar (4) is provided in the fitting projection (23).
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